Improvement in smoke-stacks and spark-arresters



I 1 W. NESMI T H D Smoke-Stacks and' Sp 'ark-Arrestersi N0.154,412. r Patented Aug.25,l874.

7 I mvmom TOMA UNITED STATES- PATENT OFFICE J. WELLINGTON NESMITH, OF- GOLDEN, COLORADO TERRITORY.

IMPROVEMENT IN SMOKE-STACKS AND SPARK-ARRESTERS.

' Specification forming part of Letters Patent No. 154.412, dated August 25, 1874 application filed May 1, 1874.

To all whom it may concern:

Be it known that I, J. WELLINGTON NES- MITH, of Golden, in the county of Jefferson and Territory of Colorado, have invented a new and useful Improvement in Smoke-Stacks and Spark-Arresters, of which the following is a specification:

The object ofthis invention is to furnish a smoke-stack and spark-arrester for coal-burnin g locomotives which will not only prevent I the escape of sparks, but economize-fuel. Or-

over the top of the flue, confined in any substantial manner, having attached thereto a series of concentric flanges or rings, forming (together) an open pyramid, surmounted by a cap, all in combination with the diamondshaped bulge or head of the smoke-stack.

In the accompanying drawing, Figure lis a vertical central section of the improved smokestack. Fig. 2 is a top view. Fig. 3 is a cross section of Fig. 1 on the line a; x.

Similarletters of reference indicate corresponding parts.

A is the smoke-flue. B is the inverted pot,-

supported over the top of the flue by the vertical springs O, or by any other suitable means. The flue is divided into two parts by the vertical partition I), which meets the apex of the inverted cone E within the pot B. F

represents one or more flanges above the pot,

and attached thereto by the straps G. These flanges diminish in'diameter from the lower to the upper one, as seen in the drawing, with space H between for the discharge of the smoke. I is the head of the smoke-stack, consisting of the frustums of two cones, connectedat their bases J. This head is attached to the outside of the smoke-flue at K, forming (with the flue) a V-shaped annular space, L, for

receiving the sparks. mm are apertures in the head nearthe connection K, closed by the. slide N, through which the sparks are removed. The course of the sparks and products of combustion is indicated by the arrows. As they ascend they are driven upward by the blast till they strike the curved surface 0 of the pot. The sparks, being thusarrested, drop by their own gravity into the V-shaped receptacle L, from whence they are removed. The smoke and gases pass out and upward, and escape Without carrying any fire. The partition D is not an indispensable feature, and the smoke-stack may be made either with or without it, to produce the same or a similar effect.

It will be seen that the entire products of combustion, as well as the exhaust-steam, are discharged into the inverted pot, and from that downward; the sparks falling, and the smoke, steam, and gases rising, as described. With this smoke-stack and spark-arrester, combined and arranged as shown, fuel is economized and the spark nuisance is entirely abated.

By dividing the smoke pipe or flue A and the cap B correspondingly into two or more parts, the products of combustion are separated and driven out in separate currents, being thus able more readily to lose their heat and deposit their sparks in the troughs F H, to which they are or cone P.

Having thus described my invention, I claim smaller as they arise above the cap, and having open intervals between them, as and for the purpose specified.

J. WELLINGTON NESMITH.

Witnesses:

JAS. M. MANAHAN, W. U. ARMOR.

guided by the inner flange 

